ValueChecker by akabi
Perceptually accurate value checker for artists, emulating Photoshop’s dot gain 20% profile.
Extension Metadata
About this extension
ValueChecker is designed for artists to check and analyze value structure of images, videos, and GIFs by emulating the working gray (dot gain 20%) profile found in Photoshop or Gray Gamma 1.8 in other software.
Standard grayscale filters/modes ignore how the human eye perceives brightness, leading to inaccurate results where bright colors can appear much darker than they should. This tool utilizes Rec. 709 luminance formula within a linear RGB color space to ensure the values remain perceptually accurate.
Press Ctrl+Y to toggle the add-on or customize it to your own liking.
Standard grayscale filters/modes ignore how the human eye perceives brightness, leading to inaccurate results where bright colors can appear much darker than they should. This tool utilizes Rec. 709 luminance formula within a linear RGB color space to ensure the values remain perceptually accurate.
Press Ctrl+Y to toggle the add-on or customize it to your own liking.
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Permissions and data
Required permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.0
- Size
- 213.72 KB
- Last updated
- 7 days ago (Apr 19, 2026)
- Related Categories
- License
- MIT License
- Version History
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